Human rights activists??? reports of abuses by the police have caused little public outcry.The result is the biggest wave of arrests since the 1990s, when Mubarak???s security forces jailed at least 20,000 people, mostly Islamists, while battling a bloody militant insurgency.Most of those detained in the crackdown since Morsi???s July 3 ouster are Islamists detained during street protests, when po